Answer:
the answer is c none of the above
Answer:
The speed is 20.8 m/s
Step-by-step explanation:
If a projectile ascends vertically, and after 3 seconds it reaches its maximum height, calculate the velocity that it carries to the middle of its downward trajectory
Let the maximum height is h and initial velocity is u.
From first equation of motion
v = u + at
0 = u - g x 3
u = 3 g.....(1)
Use third equation of motion

Let the speed at half the height is v'.

The intersection of the diagonals of a parallelogram is always the midpoint of each of the diagonals, which means all we have to do is grab two opposite vertices and average their coordinates.
<span>Let's use W and Y. </span>
<span>(-1 + 6)/2 = 2.5 </span>
<span>(7 + -2)/2 = 2.5 </span>
<span>So our point is (2.5,2.5) </span>
<span>We could also use X and Z. </span>
<span>(8 + -3)/2 = 2.5 </span>
<span>(7 + -2)/2 = 2.5 </span>
<span>Again, we get (2.5,2.5)</span>
Thirty-two million, five thousand, eight
Answer: 
Step-by-step explanation:
We have two circles:
Cirlce 1, with a radius
and area
:

And Cicle 2, with a radius
and area
:

Since Circle 1 is inside Circle 2 and assuming the area of the shaded region is the shown in the attached image, its area is:



Finally:
